Split Large File & Join Multiple Parts of a File with FFSJ (Windows Only) – Support Password Protection
FFSJ claims to be able to split and join files much faster than other free popular file splitter and joiner applications like HJ-Split, WinSplit and MasterSplitter because it can optimize memory usage and disk cache. There are two editions offered, the lite and standard FFSJ. Both are free. Highly recommended.
FFSJ Lite & FFSJ Standard
The only difference between these two is that FFSJ Lite is the portable version that you can run from your USB drive but doesn’t have the ability to integrate itself with Windows Explorer. On the other hand, FFSJ Standard requires installation and gives you option to perform the integration so that you can split and join files by right-clicking on files.
FFSJ integration with context menu

Split File
The splitting feature offers two ways to specify how a file should be splitted. You can split a file to any number of parts (e.g. 4 parts). Or, you can split it based on specific size of each part. So, for example, if you want each size of the parts musn’t exceed 100KB, a 1MB file will result in 10 parts.

If you only need to send the parts to some of your friends, the password protection feature can help you to secure them so no one can join the parts without the correct password.

Optionally, you can have the source file to be automatically deleted after the splitting is done.
Join Multiple Parts of a File
Normally, when you use other file joiner programs, you’re required to place the parts into one directory. FFSJ is different. It enables you to combine multiple parts even when each of them is located in separated directories.
Tick or mark off the “split parts are in different locations”. Drag the first part to the joining tab and press the join button. The program will automatically detect which part is missing and offer you an option to locate it and then continue with the joining process.

For example, if you have part A, B, D in one directory but part C is in another location, the program will stop after it process the part B and asks you to locate the part C. Click the “Choose the next part from different location”, navigate to the part C and double-click it. The combining process will continue until it reaches the end part. After all of the parts have been joined, the program will still ask you to locate the next part. Just click the finish button to get the whole process done.

You can also optionally have the source file to be removed once the program finishes its job.
FFSJ also supports command line. End-users can take advantage of it to split/join multiple files using a .BAT file while developers can write their own interface (in any language) to perform splitting/joining tasks from their applications.
Visit the developer’s homepage to download FFSJ.
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